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Jan 20th, 2017
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  1. function flatten(array) {
  2. let flat_array = [];
  3. let len_array = array.length;
  4.  
  5. for (let i = 0; i < len_array; i++) {
  6. if (Array.isArray(array[i])) {
  7. flat_array = flat_array.concat(flatten(array[i]));
  8. } else {
  9. flat_array.push(array[i]);
  10. }
  11. }
  12. return flat_array;
  13. }
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